Brian Bergamaschi

Dr. Brian Bergamaschi is a research biogeochemist with the USGS California Water Science Center and adjunct Faculty at California State University Sacramento.  He received a Ph.D. in Chemical Oceanography from the University of Washington, in Seattle, WA, where he specialized in analyzing the sources and fates of natural organic material in the environment.  His main interests are in understanding processes of carbon cycling in aquatic environments and related biogeochemical processes. His particular emphasis is on developing methods for quantifying the interactions between physical and biogeochemical processes. His research ranges in scale from light-mediated molecular transformations, to tidally-driven wetland fluxes, to effects of changing continental-scale fluxes on coastal carbon processes. His current projects largely focus on the effects of wetland restoration on aquatic habitat quality and carbon cycling.

Publications

Anderson, F., Bergamaschi, B., Windham-Myers, L., Woo, I., De La Cruz, S., Drexler, J., . . . Thorne, K. M. (2016). Assessing wildlife benefits and carbon storage from restored and natural coastal marshes in the Nisqually River Delta: Determining marsh net ecosystem carbon balance (2016-3042). Retrieved from Reston, VA: http://pubs.er.usgs.gov/publication/fs20163042

Anderson, F. E., Bergamaschi, B., Sturtevant, C., Knox, S., Hastings, L., Windham-Myers, L., . . . Fujii, R. (2016). Variation of energy and carbon fluxes from a restored temperate freshwater wetland and implications for carbon market verification protocols. Journal of Geophysical Research-Biogeosciences, 121(3), 777-795. doi: http://dx.doi.org/10.1002/2015jg003083

Creed, I. F., McKnight, D. M., Pellerin, B. A., Green, M. B., Bergamaschi, B. A., Aiken, G. R., . . . Smith, R. (2015). The river as a chemostat: fresh perspectives on dissolved organic matter flowing down the river continuum. Canadian Journal of Fisheries and Aquatic Sciences, 72(8), 1272-1285. doi: http://dx.doi.org/10.1139/cjfas-2014-0400

Dahm, C. N., Parker, A. E., Adelson, A. E., Christman, M. A., & Bergamaschi, B. A. (2016). Nutrient Dynamics of the Delta: Effects on Primary Producers. San Francisco Estuary and Watershed Science, 14(4). http://escholarship.org/uc/item/1789c0mz

Downing, B. D., Bergamaschi, B. A., Kendall, C., Kraus, T. E. C., Dennis, K. J., Carter, J. A., & Von Dessonneck, T. S. (2016). Using Continuous Underway Isotope Measurements To Map Water Residence Time in Hydrodynamically Complex Tidal Environments. Environmental Science & Technology, 50(24), 13387-13396. doi: http://dx.doi.org/10.1021/acs.est.6b05745

Fichot, C. G., Downing, B. D., Bergamaschi, B. A., Windham-Myers, L., Marvin-DiPasquale, M., Thompson, D. R., & Gierach, M. M. (2015). High-Resolution Remote Sensing of Water Quality in the San Francisco Bay–Delta Estuary. Environmental Science & Technology. doi: http://dx.doi.org/10.1021/acs.est.5b03518

Hafner, S. C., Watanabe, N., Harter, T., Bergamaschi, B. A., & Parikh, S. J. (2017). Effects of solid-liquid separation and storage on monensin attenuation in dairy waste management systems. Journal of Environmental Management, 190, 28-34. doi: http://dx.doi.org/10.1016/j.jenvman.2016.12.024

Hansen, A. M., Kraus, T. E. C., Pellerin, B. A., Fleck, J. A., Downing, B. D., & Bergamaschi, B. A. (2016). Optical properties of dissolved organic matter (DOM): Effects of biological and photolytic degradation. Limnology and Oceanography, 61(3), 1015-1032. doi: http://dx.doi.org/10.1002/lno.10270

Schoellhamer, D. H., Wright, S. A., Monismith, S. G., & Bergamaschi, B. A. (2016). Recent Advances in Understanding Flow Dynamics and Transport of Water-Quality Constituents in the Sacramento–San Joaquin River Delta. San Francisco Estuary and Watershed Science, 14(4). http://escholarship.org/uc/item/3vb656d6

Fleck, J. A., Gill, G., Bergamaschi, B. A., Kraus, T. E., Downing, B. D., and Alpers, C. N., 2014, Concurrent photolytic degradation of aqueous methylmercury and dissolved organic matter: Science of The Total Environment, v. 484, p. 263-275. http://dx.doi.org/10.1016/j.scitotenv.2013.03.107 [Link]

Bergamaschi, B. A., Smith, R. A., Sauer, M. J., Shih, J.-S., and Ji, L., 2014, Terrestrial Fluxes of Nutrients and Sediment to Coastal Waters and Their Effects on Coastal Carbon Storage in the Eastern United States, in Zhu, Z., and Reed, B. C., eds., Baseline and projected future carbon storage and greenhouse-gas fluxes in ecosystems of the eastern United States, U.S. Geological Survey Professional Paper 1804, US Geological Survey, p. 85-114. [Link]

Zamora, C., Dahlgren, R. A., Kratzer, C. R., Downing, B. D., Russell, A. D., Dileanis, P. D., Bergamaschi, B. A., and Phillips, S. P., 2013, Groundwater Contributions of Flow, Nitrate, and Dissolved Organic Carbon to the Lower San Joaquin River, California, 2006–08, U.S. Geological Survey Scientific Investigations Report 2013–5151, 105 p. [Link]

Pellerin, B. A., Bergamaschi, B.A., Downing, B.D., Saraceno, J.F., Garrett, J.A., Olsen, L.D., 2013, Optical techniques for the determination of nitrate in environmental waters: Guidelines for instrument selection, operation, deployment, maintenance, quality assurance, and data reporting U.S. Geological Survey Techniques and Methods 1–D5, 37 p. [Link]

Moskalski, S. M., Torres, R., Bizimis, M., Goni, M., Bergamaschi, B., and Fleck, J., 2013, Low-tide rainfall effects on metal content of suspended sediment in the Sacramento-San Joaquin Delta: Continental Shelf Research, v. 56, p. 39-55

Oh, N.-H., Pellerin, B. A., Bachand, P. A. M., Hernes, P. J., Bachand, S. M., Ohara, N., Kavvas, M. L., Bergamaschi, B. A., and Horwath, W. R., 2013, The role of irrigation runoff and winter rainfall on dissolved organic carbon loads in an agricultural watershed: Agriculture, Ecosystems & Environment, v. 179, no. 0, p. 1-10. [Link]

Hernes, P. J., Spencer, R. G. M., Dyda, R. Y., Pellerin, B. A., Bachand, P. A. M., and Bergamaschi, B. A., 2013, DOM composition in an agricultural watershed: Assessing patterns and variability in the context of spatial scales: Geochimica Et Cosmochimica Acta, v. 121, p. 599-610. [Link]

Pellerin, B.A., Bergamaschi, B.A., and Horsburgh, J.S., 2012, In situ optical water-quality sensor networks—Workshop summary report: U.S. Geological Survey Open-File Report 2012–1044, 13 p. [Link]

Bergamaschi, B.; Fleck, J.; Downing, B.; Boss, E.; Pellerin, B.; Ganju, N.; Schoellhamer, D.; Byington, A.; Heim, W.; Stephenson, M.; Fujii, R., Mercury Dynamics in a San Francisco Estuary Tidal Wetland: Assessing Dynamics Using In Situ Measurements. Estuaries and Coasts, 1-13. [Link]

Bergamaschi, B.; Pellerin, B., Coordinating standards and applications for optical water quality sensor networks. Eos 2011, 92 (30), 251 [Link]

Luengen, A. C., Fisher, N. S., and Bergamaschi, B. A., 2012, Dissolved organic matter reduces algal accumulation of methylmercury: Environmental Toxicology and Chemistry, v. 31, no. 8, p. 1712-1719.[Link]

Bergamaschi, B. A., Smith, R. A., Sauer, M. J., and Shih, J.-S., 2012c, Terrestrial Fluxes of Sediments and Nutrients to Pacific Coastal Waters and Their Effects on Coastal Carbon Storage Rates, in Zhu, Z., and Reed, B. C., eds., Baseline and projected future carbon storage and greenhouse-gas fluxes in ecosystems of the Western United States, U.S. Geological Survey Professional Paper 1797, US Geological Survey, p. 143-158. [Link]

Bergamaschi, B. A., Krabbenhoft, D. P., Aiken, G. R., Patino, E., Rumbold, D. G., and Orem, W. H., 2012, Tidally Driven Export of Dissolved Organic Carbon, Total Mercury, and Methylmercury from a Mangrove-Dominated Estuary: Environmental Science & Technology, v. 46, no. 3, p. 1371-1378 [Link]

Downing, B. D., B. A. Pellerin, B. A. Bergamaschi, J. F. Saraceno, and T. E. C. Kraus. 2012. Seeing the light: The effects of particles, dissolved materials, and temperature on in situ measurements of DOM fluorescence in rivers and streams. Limnology and Oceanography: Methods 10:767-775. [Download File]

Bergamaschi, B. A.; Krabbenhoft, D. P.; Aiken, G. R.; Patino, E.; Rumbold, D. G.; Orem, W. H., Tidally Driven Export of Dissolved Organic Carbon, Total Mercury, and Methylmercury from a Mangrove-Dominated Estuary. Environ. Sci. Technol. 2012, 46 (3), 1371-1378. [Download File]

Downing, B. D., Pellerin, B. A., Bergamaschi, B. A., Saraceno, J. F., and Kraus, T. E. C., 2012, Seeing the light: The effects of particles, dissolved materials, and temperature on in situ measurements of DOM fluorescence in rivers and streams: Limnology and Oceanography: Methods, v. 10, no. OCTOBER, p. 767-775. [Download File]

Bergamaschi, B., Fleck, J., Downing, B., Boss, E., Pellerin, B., Ganju, N., Schoellhamer, D., Byington, A., Heim, W., Stephenson, M., and Fujii, R., 2012, Mercury Dynamics in a San Francisco Estuary Tidal Wetland: Assessing Dynamics Using In Situ Measurements: Estuaries and Coasts, p. 1-13. [Download File]

Zhu, Z. E., B. Bergamaschi, R. Bernknopf, D. Clow, D. Dye, S. Faulkner, W. Forney, R. Gleason, T. Hawbaker, J. Liu, S. Liu, S. Prisley, B. Reed, M. Reeves, M. Rollins, B. Sleeter, T. Sohl, S. Stackpoole, S. Stehman, R. Striegl, A. Wein, and Z. Zhu. 2010. A Method for Assessing Carbon Stocks, Carbon Sequestration, and Greenhouse-Gas Fluxes in Ecosystems of the United States Under Present Conditions and Future Scenarios, p. xviii, 196 p.; Appendices. Open-File Report. USGS Numbered Series. U.S. Geological Survey. [Link]

Pellerin, BA, Bergamaschi, BA, Murdoch, PS, Downing, BD, Saraceno, J, Aiken, GR, and Striegl, RG. 2011, The aquatic real-time monitoring network; in-situ optical sensors for monitoring the nation's water quality: U.S. Geological Survey Fact Sheet 2011-3061, 2 p. [Link]

Pellerin BA, J Saraceno, J Shanley, S Sebestyn, G Aiken, WM Wollheim and BA Bergamaschi. 2011. Taking the pulse of snowmelt: In situ sensors reveal seasonal, event and diurnal patterns of nitrate and dissolved organic matter variability in an upland forest stream. Biogeochemistry, DOI 10.1007/s10533-011-9589-8. [Download File]

Florsheim JL, BA Pellerin, ML Kavvas, N Ohara, BA Bergamaschi, PJ Hernes, PAM Bachand, S Bachand and NH Oh. 2011. From Deposition to Erosion: Spatial and Temporal Variability of Sediment Sources Storage, and Transport in a Small Agricultural Watershed. Geomorphology, doi:10.1016/j.geomorph.2011.04.037 [Download File]

Bergamaschi, B. A., J. A. Fleck, B. D. Downing, E. Boss, B. Pellerin, N. K. Ganju, D. Schoellhamer, W. Heim, M. Stephenson, and R. Fujii. 2011. Methyl mercury dynamics in a tidal wetland quantified using in situ optical measurements. Limnology and Oceanography 56: 1355-1371. [Download File]

Kraus, T. E. C., Bergamaschi, B. A., Hernes, P. J., Doctor, D., Kendall, C., Downing, B. D., and Losee, R. F., 2011, How reservoirs alter drinking water quality: Organic matter sources, sinks, and transformations: Lake and Reservoir Management, v. 27, no. 3, p. 205-219. [Download File]

Watanabe, N., B. A. Bergamaschi, K. A. Loftin, M. T. Meyer, and T. Harter. 2010. Use and Environmental Occurrence of Antibiotics in Freestall Dairy Farms with Manured Forage Fields. Environmental Science & Technology 44: 6591-6600. [Download File]

Spencer, R. G. M., G. R. Aiken, R. Y. Dyda, K. D. Butler, B. A. Bergamaschi, and P. J. Hernes. 2010. Comparison of XAD with other dissolved lignin isolation techniques and a compilation of analytical improvements for the analysis of lignin in aquatic settings. Organic Geochemistry 41: 445-453. [Download File]

Sickman, J. O., C. L. Digiorgio, M. L. Davisson, D. M. Lucero, and B. Bergamaschi. 2010. Identifying sources of dissolved organic carbon in agriculturally dominated rivers using radiocarbon age dating: Sacramento-San Joaquin River Basin, California. Biogeochemistry 99: 79-96. [Download File]

Pellerin, B. A., P. J. Hernes, J. Saraceno, R. G. M. Spencer, and B. A. Bergamaschi. 2010. Microbial degradation of plant leachate alters lignin phenols and trihalomethane precursors. Journal of Environmental Quality 39: 946-954. [Download File]

Kraus, T. E. C., C. A. Anderson, K. Morgenstern, B. D. Downing, B. A. Pellerin, and B. A. Bergamaschi. 2010a. Determining Sources of Dissolved Organic Carbon and Disinfection Byproduct Precursors to the McKenzie River, Oregon. Journal of Environmental Quality 39: 2100-2112. [Download File]

Bergamaschi BA, BD Downing, BA Pellerin and J Saraceno. 2010. In Situ Sensors for Dissolved Organic Matter Fluorescence: Bringing the Lab to the Field. USGS Water Resources Discipline Instrument News, 125: 1-2. [Download File]

Hernes, P. J., B. A. Bergamaschi, R. S. Eckard, and R. G. M. Spencer. 2009. Fluorescence-based proxies for lignin in freshwater dissolved organic matter. Journal of Geophysical Research-Biogeosciences114. [Download File]

Saraceno, J. F., B. A. Pellerin, B. D. Downing, E. Boss, P. a. M. Bachand, and B. A. Bergamaschi. 2009. High-frequency in situ optical measurements during a storm event: Assessing relationships between dissolved organic matter, sediment concentrations, and hydrologic processes. Journal of Geophysical Research-Biogeosciences 114: G00F09, doi: 10.1029/2009jg000989. [Download File]

Pellerin, B. A., B. D. Downing, C. Kendall, R. A. Dahlgren, T. E. C. Kraus, J. Saraceno, R. G. M. Spencer, and B. A. Bergamaschi. 2009. Assessing the sources and magnitude of diurnal nitrate variability in the San Joaquin River (California) with an in situ optical nitrate sensor and dual nitrate isotopes. Freshwater Biology 54: 376-387. [Download File]

Downing, B. D., E. Boss, B. A. Bergamaschi, J. A. Fleck, M. A. Lionberger, N. K. Ganju, D. H. Schoellhamer, and R. Fujii. 2009. Quantifying fluxes and characterizing compositional changes of dissolved organic matter in aquatic systems in situ using combined acoustic and optical measurements. Limnol. Oceanogr. Meth. 7: 119-131. [Download File]

Hernes, P. J., R. G. M. Spencer, R. Y. Dyda, B. A. Pellerin, P. a. M. Bachand, and B. A. Bergamaschi. 2008. The role of hydrologic regimes on dissolved organic carbon composition in an agricultural watershed. Geochimica Et Cosmochimica Acta 72: 5266-5277. [Download File]

Watanabe, N., T. H. Harter, and B. A. Bergamaschi. 2008. Environmental occurrence and shallow ground water detection of the antibiotic monensin from dairy farms. Journal of Environmental Quality 37:S78-S85. [Download File]

Kraus, T. E. C., B. A. Bergamaschi, P. J. Hernes, R. G. M. Spencer, R. Stepanauskas, C. Kendall, R. F. Losee, and R. Fujii. 2008. Assessing the contribution of wetlands and subsided islands to dissolved organic matter and disinfection byproduct precursors in the Sacramento-San Joaquin River Delta: A geochemical approach. Organic Geochemistry 39: 1302-1318. [Download File]

Downing, B. D., B. A. Bergamaschi, D. G. Evans, and E. Boss. 2008. Assessing contribution of DOC from sediments to a drinking-water reservoir using optical profiling. Lake and Reservoir Management 24:381-391. [Download File]

Chomyia, J. C., P. J. Hernes, T. Harter, and B. A. Bergamaschi. 2008. Land management impacts on dairy-derived dissolved organic carbon in ground water. Journal of Environmental Quality 37: 333-343.[Download File]

Spencer, R. G. M., B. A. Pellerin, B. A. Bergamaschi, B. D. Downing, T. E. C. Kraus, D. R. Smart, R. A. Dahgren, and P. J. Hernes. 2007. Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA). Hydrological Processes 21: 3181-3189. [Download File]

Eckard, R. S., P. J. Hernes, B. A. Bergamaschi, R. Stepanauskas, and C. Kendall. 2007. Landscape scale controls on the vascular plant component of dissolved organic carbon across a freshwater delta. Geochimica Et Cosmochimica Acta 71: 5968-5984. [Download File]

Bergamaschi, B. A., E. Kalve, L. Guenther, G. O. Mendez, and K. Belitz. 2005. An assessment of optical properties of dissolved organic material as quantitative source indicators in the Santa Ana River basin, Southern California, p. 46 p., Scientific Investigations Report. USGS Numbered Series. [Link]

Zazzi, B. C., K. L. Crepeau, M. S. Fram, and B. A. Bergamaschi. 2005. Method of analysis at the U.S. Geological Survey California Water Science Center, Sacramento Laboratory - determination of haloacetic acid formation potential, method validation, and quality-control practices, p. 28 p., Scientific Investigations Report. USGS Numbered Series. [Link]

Stepanauskas, R., M. A. Moran, B. A. Bergamaschi, and J. T. Hollibaugh. 2005. Sources, bioavailabitity, and photoreactivity of dissolved organic carbon in the Sacramento-San Joaquin River Delta. Biogeochemistry 74: 131-149. [Download File]

Ganju, N. K., D. H. Schoellhamer, and B. A. Bergamaschi. 2005. Suspended sediment fluxes in a tidal wetland: Measurement, controlling factors, and error analysis. Estuaries 28: 812-822. [Download File]

Kratzer, C. R., P. D. Dileanis, C. Zamora, S. R. Silva, C. Kendall, B. A. Bergamaschi, and R. A. Dahlgren. 2004. Sources and Transport of Nutrients, Organic Carbon, and Chlorophyll-a in the San Joaquin River Upstream of Vernalis, California, during Summer and Fall, 2000 and 2001, p. 124 p., Water-Resources Investigations Report. USGS Numbered Series. [Link]

Izbicki, J. A., M. I. Pimentel, M. Leddy, and B. Bergamaschi. 2004. Microbial and Dissolved Organic Carbon Characterization of Stormflow in the Santa Ana River at Imperial Highway, Southern California, 1999-2002, p. 80 p., Scientific Investigations Report. USGS Numbered Series. [Link]

Stepanauskas, R., M. A. Moran, B. A. Bergamaschi, and J. T. Hollibaugh. 2003. Covariance of bacterioplankton composition and environmental variables in a temperate delta system. Aquatic Microbial Ecology 31: 85-98.

Fram, M. S., B. A. Bergamaschi, K. D. Goodwin, R. Fujii, and J. F. Clark. 2003. Processes Affecting the Trihalomethane Concentrations Associated with the Third Injection, Storage, and Recovery Test at Lancaster, Antelope Valley, California, March 1998 through April 1999, p. 72 p., Water-Resources Investigations Report. USGS Numbered Series. [Link]

Weishaar, J. L., G. R. Aiken, B. A. Bergamaschi, M. S. Fram, R. Fujii, and K. Mopper. 2003. Evaluation of specific ultraviolet absorbance as an indicator of the chemical composition and reactivity of dissolved organic carbon. Environmental Science & Technology 37: 4702-4708. [Download File]

Bergamaschi, B. A., K. M. Kuivila, and M. S. Fram. 2001. Pesticides associated with suspended sediments entering San Francisco Bay following the-first major storm of water year 1996. Estuaries 24: 368-380. [Download File]

Bergamaschi, B. A., M. S. Fram, C. Kendall, S. R. Silva, G. R. Aiken, and R. Fujii. 1999a. Carbon isotopic constraints on the contribution of plant material to the natural precursors of trihalomethanes. Organic Geochemistry 30: 835-842. [Download File]

Bergamaschi, B. A., E. Tsamakis, R. G. Keil, T. I. Eglinton, D. B. Montlucon, and J. I. Hedges. 1997b. The effect of grain size and surface area on organic matter, lignin and carbohydrate concentration, and molecular compositions in Peru Margin sediments. Geochimica Et Cosmochimica Acta 61: 1247-1260. [Download File]
 

OTHER PUBLICATIONS

Stepanauskas, Ramunas, Moran, M.A., Bergamaschi, B.A., and Hollibaugh, J.T., 2003, Covariance of bacterioplankton composition and environmental variables in a temperate delta system: Aquatic Microbial Ecology, v. 31, p. 85-98.

Crepeau, K.L., Kuivila, K.M., and Bergamaschi, Brian, 2002, Dissolved Pesticides in the Alamo River and the Salton Sea, California, 1996-97: U.S. Geological Survey Open-File Report 02-232, 7 p.

Fram, Miranda S., Brian Bergamaschi, and Roger Fujii (2001) Improving water quality in Sweetwater Reservoir, San Diego County, California: Sources and mitigation strategies for trihalomethane-forming materials; USGS Fact Sheet FS-112-01

Hernes, PJ; Benner, R; Cowie, GL; Goni, MA; Bergamaschi, BA; Hedges, JI. (2001) Tannin diagenesis in mangrove leaves from a tropical estuary: A novel molecular approach. GEOCHIMICA ET COSMOCHIMICA ACTA, V65(N18):3109-3122.

Bergamaschi, B.A., Fram, M.S., Fujii, Roger, Aiken, G.R., Kendall, Carol, and Silva, S.R. (2000) The carbon isotopic composition of trihalomethanes formed from chemically distinct dissolved organic carbon isolates from the Sacramento-San Joaquin River Delta. ACS Symposium series 761: Natural Organic Matter and Disinfection By-products: Characterization and Control in Drinking Water, Barret, Krasner and Amy eds. P 206-222.

Bergamaschi, Brian A., Jeffery Walters, and John I. Hedges, (1999) Distributions of uronic acids and O-methyl sugars in particles from two coastal marine environments. GEOCHIMICA ET COSMOCHIMICA ACTA, V63(N3-4):413-425.

Bergamaschi, B.A., K.M. Kuivila, M.S. Fram (1999) Pesticides associated with suspended sediments entering the San Francisco Estuary during the 1995 first flush event. in Morganwalp, D.W., and Buxton, H.T. (eds.), U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 99-107.

Fram, M.S., R. Fujii, J.L.Wieshaar, B.A. Bergamaschi, and G.R. Aiken (1999) How DOC composition may explain the poor correlation between specific trihalomethane formation potential and specific UV absorbance. in Morganwalp, D.W., and Buxton, H.T. (eds.), U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 423-430.

Bergamaschi, B.A., Fram, M.S., Fujii, Roger, Aiken, G.R., Kendall, Carol, and Silva, S.R. (1999) The carbon isotopic composition of trihalomethanes formed from chemically distinct dissolved organic carbon isolates from the Sacramento-San Joaquin River Delta, CA, USA, in Morganwalp, D.W., and Buxton, H.T. (eds.), U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 99-107.

Bergamaschi, Brian A., Kathryn L. Crepeau, and Kathryn M. Kuivila (1998) Determination of pesticides associated with sediments in the San Joaquin River, California, U.S.A., using gas chromatography-ion trap mass spectrometry. Toxicological and Environmental Chemistry, v. 69, p. 305-319.

Fujii, Roger, Ranalli, A.J., Aiken, G.R., and Bergamaschi, B.A. (1998) Dissolved Organic Carbon Concentrations and Compositions, and Trihalomethane Formation Potentials in Waters from Agricultural Peat Soils, Sacramento-San Joaquin Delta, California: Implications for Drinking-Water Quality: U.S. Geological Survey Water-Resources Investigations Report 98-4147, 75 p.

Fujii, R., A.J. Ranalli, G.R. Aiken, and B.A. Bergamaschi (1998) Assessment of DOC release from organic soils and potential to form trihalomethanes, Sacramento-San Joaquin Delta, USGS OFR 98-119.

Bergamaschi, Brian A., Kathryn L. Crepeau, and Kathryn M. Kuivila (1997) Pesticides associated with suspended sediments in the San Francisco Bay Estuary.  USGS OFR 97-24.

Bergamaschi, Brian A. and John I. Hedges (1996) A one-pot procedure for conversion of glycosides into acetylated glycosyl fluorides.  Carbohydrate Research 280:345-350.

Bergamaschi, Brian A. (1995) The marine geochemistry of carbohydrates: application and development of new techniques.  Dissertation. University of Washington.

Bergamaschi, Brian A. and John I. Hedges (1995) A multichambered apparatus for HF solvolysis experiments: reaction of HF solvolysis products with acetic acid and acetic anhydride.  Carbohydrate Research 267:115-126.

Hopkinson, C., Cifuentes, L. Burdige, D., Fitzwater, S. Hansell, D., Hendrichs, S. Kahler, P., Koike, I., Walsh, T., and B. Bergamaschi (1993) Measurement of dissolved organic carbon and nitrogen in natural waters - DON Subgroup Report. Marine Chemistry  41:23-36.

Hedges, J.I., B.A. Bergamaschi and R. Benner (1993) Comparative analysis of DOC and DON in natural waters. Marine Chemistry  41:121-134. 

Hedges, John I. and Brian A. Bergamaschi (1992) Seawater carbon measurement.  Nature  359:202.